Valve



June 16, 1925. 1,542,612

LLLLLLLL AR VALVE INVENTOI? o D. coL/ AR ATTPNEKS Patented June 16,1925.

` UNITED STATES PATENT OFFICE.

LLOYD D. COLLAR, OF ALAMEDA, CALIFORNIA, ASSIGNOR TO COLLAR VAL'V'E COR-PORATION, F OAKLAND, CALIFORNIA, A CORPORATION OF CALIFORNIA.

vALvn.

Application mea January so, 1924. seal No. 689,546.

To all whom t may concer/n.:

Be it known that I, LLOYD D. COLLAR, a citizen of the Unitedv States,residing at Alameda, county of Alameda, and State of California, haveinvented new and useful Improvements in Valves, of which thefollowing isa specification.

This invention relates to valves of th self-grinding type.

, It is the principal object of the present invention to generallyimprove the construction and operation of valves of the characterreferred to, whereby to provide a valve constructed in a manner4entirely eliminating the necessity of disassembling it and regrindingthe valve member and its seat. The valve is efficient in operation andcomparatively inexpensive to manufacture.

In carrying out this object, I provide a valve in which the valve memberand its seat are formed withy convex seating faces, the valve memberbeing mounted for movement toward and away from theseat in av mannercausing it to grind on the seat each time it is opened and closed, .thusinsuring perfect seating 'of the valve member and obviatinv thenecessity of having the valve disassem led and the valve member and itsseat reground.

One form which the invention may assume is described in the following,and illustrated by way of exam le in the accompanying drawings, inwhiia- Fig. 1 is a vertical section through Aa valve disclosing thepreferred form of the invention.

Fig. 2 is a horizontal section through the bomiet of the valve taken online 2-2 of ferring more particularly to the accompanying drawin s,'Ishow a valve body 10 formed with an'inlet connection 11 and an outletconnectionx 12` forming inlet and outlet chambers 14 and 15. Thesechambers are shown as arranged in the same plane and are separated by aartition wall 16.- This wall 1s formed wit a threaded aperture 16'Lwithin which is threaded a valve seaty member 17 which is formed with adivergentv convex valve seat 17% The valve seat member may be threadedinto or disengaged from the threads in the aperture 16* and removed fromthe valve body by the use of a. suitable tool engageable with thebonnet, is a sleeve 22 which is feathered in" the bonnet by a dowl pin22a. This latter element permits the sleeve to reciprocate b ut preventsit from rotating. An expans1on spring 23 is interposed between thissleeve and the ring 21. This spring tends to maintain the sleeve in itsuppermost position as shown in Fig. 1. r

The bonnet is fitted at its upper end with a packing gland 24 whichforms a guide for a valve stem 25. A valve member 26 'is fitted at thelower end of the valve stem for (zo-operation with the valve seat. Theface of this valve member is divergent and convex. l

`The central portion of the valve stem 25 is slightly enlarged and is 1formed with threads which engage similar threads formed in thereciprocable sleeve 22. The upper end of the valve stem is fitted with ahand wheel whereby it may be rotated to open and close the valve.

In operation, assuming closed and the parts are in the positionillustrated in Fig. 1, continued rotation of the y valve stem in thedirection tending to close the valve will tend to force the sleeve 22inwardly against the pressure of the spring 23. This will cause agrinding action between the diver ent and convex seating surfaces of theva ve member 26 and the seat member 17. When the stem is rotated to4unseat the valve member asimilar grinding action will take place untilthe sleeve 22 has been moved into contact with the outer end of thebonnet. YContinued ro'tation of the stem will then unseat the valve.

By forming the ,seating faces of the valve member and its seat divergentand convex, a continued grinding action will take lace therebetween andwill eventually re t 1n the forming of flat tapered faces on the seatthat the valve is valve to b e manufactured and assembled at a minimumof expense.

It is obvious from the foregoing that a very desirable valve has beenprovided which Will require a minimum of repairs and attention when inuse, and which Will not be liable to leak.

While I have shown the preferred form of my invention, it is understoodthat various changes may be made in its construction Without departing`from the spirit of the inventionas defined in the appended. claims.

.Having thusl described my invention, what I claim and desire to secureby Letters Patent is 1. A'valve'comprising a valve body having inlet andoutlet chambers, a partition Wall between said chambers, said Wall beingformed With a valve opening surrounded by a divergent convex valve seat,a cylindrically bored bonnet on the valve body mounted on the body atright angles to the longitudinal axis of the inlet 'andout1et chambersand in Leeaeia through said sleeve, a valve member having a divergentconvex face carried at the lower end of said stem for co-operation withsaid convex valve seat.

Y, 2. A valve comprlsing a valve body having inletl and outlet chambers,a partition' Wall therebetween, said Wall being formed With a valve\opening having a. removable member With a convex seat, a cylindricallybored bonnet mounted on the valve body, an annular ring secured in thevalve body at the innermost end of the bonnet, a reciprocable sleevemember mounted inthe bonnet LLOYD D. COLLAR.

